package com.yhsimon.seckill.controller;

import com.yhsimon.seckill.pojo.User;
import com.yhsimon.seckill.service.IGoodsService;
import com.yhsimon.seckill.vo.DetailVo;
import com.yhsimon.seckill.vo.GoodsVo;
import com.yhsimon.seckill.vo.RespBean;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.ValueOperations;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.thymeleaf.context.WebContext;
import org.thymeleaf.spring5.view.ThymeleafViewResolver;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.Date;
import java.util.concurrent.TimeUnit;


/**
 * @author： YHSimon
 * @date： 2022-04-22 17:53
 */

@Controller
@RequestMapping("/goods")
public class GoodsController {

    // @Autowired
    // private IUserService userService;

    @Autowired
    private IGoodsService goodsService;

    @Autowired
    private RedisTemplate redisTemplate;

    @Autowired
    private ThymeleafViewResolver thymeleafViewResolver;

    /**
     * 跳转商品界面
     * 10000线程(3次)
     * windows优化前QPS: 697
     *     页面缓存后QPS: 1042
     *
     * 页面缓存
     * @param model
     * @return
     */
    @RequestMapping(value = "/toList",produces = "text/html;charset=utf-8")
    @ResponseBody
    // 引入WebConfig前
    // public String toList(HttpServletRequest request, HttpServletResponse response, Model model, @CookieValue("userTicket") String ticket){
    // 引入WebConfig后
    public String toList(Model model, User user, HttpServletRequest request,HttpServletResponse response) {
        // if (StringUtils.isEmpty(ticket)) {
        //     return "login";
        // }
        // User user = (User) session.getAttribute(ticket);
        // User user = userService.getUserByCookie(ticket, request, response);
        // if (null == user) {
        //     return "login";
        // }

        //Redis中获取页面，如果不为空，直接返回页面
        ValueOperations valueOperations = redisTemplate.opsForValue();
        String html = (String) valueOperations.get("goodsList");
        if(!StringUtils.isEmpty(html)){
            return html;
        }
        model.addAttribute("user", user);
        model.addAttribute("goodsList", goodsService.findGoodsVo());
        // return "goodsList";
        // 如果html为空，手动渲染页面，存入Redis并返回
        WebContext webContext = new WebContext(request, response, request.getServletContext(), request.getLocale(), model.asMap());
        html = thymeleafViewResolver.getTemplateEngine().process("goodsList", webContext);
        if(!StringUtils.isEmpty(html)){
            valueOperations.set("goodsList", html,60, TimeUnit.SECONDS);
        }
        return html;
    }

    /**
     * 获取商品详情
     *
     * url缓存：缓存不同商品（goodsId）详情页面
     *
     * @param model
     * @param user
     * @param goodsId
     * @return
     */
    @RequestMapping("/detail/{goodsId}")
    @ResponseBody
    public RespBean toDetail(Model model, User user, @PathVariable Long goodsId) {
        GoodsVo goodsVo = goodsService.findGoodsVoByGoodsId(goodsId);
        Date startDate = goodsVo.getStartDate();
        Date endDate = goodsVo.getEndDate();
        Date nowDate = new Date();
        // 秒杀状态
        int seckillStatus = 0;
        // 秒杀倒计时
        int remainSeconds;
        if (nowDate.before(startDate)) {
            remainSeconds= (int) ((startDate.getTime()-nowDate.getTime())/1000);
        } else if (nowDate.after(endDate)) {
            // 秒杀已结束
            seckillStatus = 2;
            remainSeconds=-1;
        } else {
            // 秒杀进行中
            seckillStatus = 1;
            remainSeconds=0;
        }

        DetailVo detailVo = new DetailVo();
        detailVo.setUser(user);
        detailVo.setGoodsVo(goodsVo);
        detailVo.setSeckillStatus(seckillStatus);
        detailVo.setRemainSeconds(remainSeconds);
        return RespBean.success(detailVo);
    }


    /**
     * 获取商品详情
     *
     * url缓存：缓存不同商品（goodsId）详情页面
     *
     * @param model
     * @param user
     * @param goodsId
     * @return
     */
    @RequestMapping(value = "/toDetail2/{goodsId}",produces = "text/html;charset=utf-8")
    @ResponseBody
    public String toDetail2(Model model, User user, @PathVariable Long goodsId,HttpServletRequest request,HttpServletResponse response) {
        ValueOperations valueOperations = redisTemplate.opsForValue();
        String html = (String) valueOperations.get("goodsDetail:" + goodsId);
        if(!StringUtils.isEmpty(html)){
            return html;
        }
        model.addAttribute("user", user);
        GoodsVo goodsVo = goodsService.findGoodsVoByGoodsId(goodsId);
        Date startDate = goodsVo.getStartDate();
        Date endDate = goodsVo.getEndDate();
        Date nowDate = new Date();
        // 秒杀状态
        int seckillStatus = 0;
        // 秒杀倒计时
        int remainSeconds;
        if (nowDate.before(startDate)) {
            remainSeconds= (int) ((startDate.getTime()-nowDate.getTime())/1000);
        } else if (nowDate.after(endDate)) {
            // 秒杀已结束
            seckillStatus = 2;
            remainSeconds=-1;
        } else {
            // 秒杀进行中
            seckillStatus = 1;
            remainSeconds=0;
        }

        model.addAttribute("seckillStatus", seckillStatus);
        model.addAttribute("remainSeconds", remainSeconds);
        model.addAttribute("goods", goodsVo);
        WebContext webContext = new WebContext(request, response, request.getServletContext(), request.getLocale(), model.asMap());
        html = thymeleafViewResolver.getTemplateEngine().process("goodsDetail", webContext);
        if(!StringUtils.isEmpty(html)){
            valueOperations.set("goodsDetail:"+goodsId, html,60,TimeUnit.SECONDS);
        }
        return html;
        // return "goodsDetail";
    }


}
